742211720 has 16 divisors (see below), whose sum is σ = 1669976460. Its totient is φ = 296884672.

The previous prime is 742211713. The next prime is 742211759. The reversal of 742211720 is 27112247.

It can be written as a sum of positive squares in 2 ways, for example, as 653211364 + 89000356 = 25558^2 + 9434^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 742211720.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9277607 + ... + 9277686.

Almost surely, 2^742211720 is an apocalyptic number.

It is an amenable number.

742211720 is an abundant number, since it is smaller than the sum of its proper divisors (927764740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

742211720 is a wasteful number, since it uses less digits than its factorization.

742211720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18555304 (or 18555300 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 742211720 is about 27243.5629094287. The cubic root of 742211720 is about 905.4044039827.

Adding to 742211720 its reverse (27112247), we get a palindrome (769323967).

The spelling of 742211720 in words is "seven hundred forty-two million, two hundred eleven thousand, seven hundred twenty".